sksg::OpacityEffect Class Reference

#include <SkSGOpacityEffect.h>

Inheritance diagram for sksg::OpacityEffect:

Static Public Member Functions
static sk_sp< OpacityEffect >	Make (sk_sp< RenderNode > child, float opacity=1)

Protected Member Functions
	OpacityEffect (sk_sp< RenderNode >, float)
void	onRender (SkCanvas *, const RenderContext *) const override
const RenderNode *	onNodeAt (const SkPoint &) const override
SkRect	onRevalidate (InvalidationController *, const SkMatrix &) override
Protected Member Functions inherited from sksg::EffectNode
	EffectNode (sk_sp< RenderNode >, uint32_t inval_traits=0)
	~EffectNode () override
void	onRender (SkCanvas *, const RenderContext *) const override
const RenderNode *	onNodeAt (const SkPoint &) const override
SkRect	onRevalidate (InvalidationController *, const SkMatrix &) override
const sk_sp< RenderNode > &	getChild () const
Protected Member Functions inherited from sksg::RenderNode
	RenderNode (uint32_t inval_traits=0)
virtual void	onRender (SkCanvas *, const RenderContext *) const =0
virtual const RenderNode *	onNodeAt (const SkPoint &p) const =0
Protected Member Functions inherited from sksg::Node
	Node (uint32_t invalTraits)
	~Node () override
const SkRect &	bounds () const
bool	hasInval () const
virtual SkRect	onRevalidate (InvalidationController *, const SkMatrix &ctm)=0
void	observeInval (const sk_sp< Node > &)
void	unobserveInval (const sk_sp< Node > &)

Additional Inherited Members
Public Member Functions inherited from sksg::RenderNode
void	render (SkCanvas *, const RenderContext *=nullptr) const
const RenderNode *	nodeAt (const SkPoint &point) const
bool	isVisible () const
void	setVisible (bool)
Public Member Functions inherited from sksg::Node
const SkRect &	revalidate (InvalidationController *, const SkMatrix &)
void	invalidate (bool damage=true)
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const
Protected Types inherited from sksg::Node
enum	InvalTraits { kBubbleDamage_Trait = 1 << 0 , kOverrideDamage_Trait = 1 << 1 }

Detailed Description

Concrete Effect node, applying opacity to its descendants.

Definition at line 30 of file SkSGOpacityEffect.h.

Constructor & Destructor Documentation

OpacityEffect()

sksg::OpacityEffect::OpacityEffect ( sk_sp< RenderNode >  child, float  opacity  )

protected

Definition at line 18 of file SkSGOpacityEffect.cpp.

    : INHERITED(std::move(child))
    , fOpacity(opacity) {}

Member Function Documentation

Make()

static sk_sp< OpacityEffect > sksg::OpacityEffect::Make ( sk_sp< RenderNode >  child, float  opacity = 1  )

inlinestatic

Definition at line 32 of file SkSGOpacityEffect.h.

                                                                                 {
        return child ? sk_sp<OpacityEffect>(new OpacityEffect(std::move(child), opacity)) : nullptr;
    }

onNodeAt()

const RenderNode * sksg::OpacityEffect::onNodeAt ( const SkPoint &  p ) const

overrideprotectedvirtual

Reimplemented from sksg::EffectNode.

Definition at line 38 of file SkSGOpacityEffect.cpp.

                                                                {
    return (fOpacity > 0) ? this->INHERITED::onNodeAt(p) : nullptr;
}

onRender()

void sksg::OpacityEffect::onRender ( SkCanvas *  canvas, const RenderContext *  ctx  ) const

overrideprotectedvirtual

Reimplemented from sksg::EffectNode.

Definition at line 22 of file SkSGOpacityEffect.cpp.

                                                                             {
    // opacity <= 0 disables rendering
    if (fOpacity <= 0)
        return;
 
    // opacity >= 1 has no effect
    if (fOpacity >= 1) {
        this->INHERITED::onRender(canvas, ctx);
        return;
    }
 
    const auto local_context = ScopedRenderContext(canvas, ctx).modulateOpacity(fOpacity);
 
    this->INHERITED::onRender(canvas, local_context);
}

onRevalidate()

SkRect sksg::OpacityEffect::onRevalidate ( InvalidationController *  ic, const SkMatrix &  ctm  )

overrideprotectedvirtual

Reimplemented from sksg::EffectNode.

Definition at line 42 of file SkSGOpacityEffect.cpp.

                                                                                  {
    SkASSERT(this->hasInval());
 
    // opacity <= 0 disables rendering AND revalidation for the sub-DAG
    return fOpacity > 0 ? this->INHERITED::onRevalidate(ic, ctm) : SkRect::MakeEmpty();
}

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The documentation for this class was generated from the following files:

• third_party/skia/modules/sksg/include/SkSGOpacityEffect.h
• third_party/skia/modules/sksg/src/SkSGOpacityEffect.cpp